Focal professional

Studio monitor loudspeakers

Твиттер с инвертированным куполом

The inverted dome tweeter - a Focal hallmark – is perhaps the perfect transducer.
This design permits very high-efficiency, precision
and energy.

Classic dome

Inverted dome

The particular advantage of the inverted dome tweeter is the optimization of the mechanical coupling between the voice coil and
the dome. The voice coil is fixed at mid-height on the dome and uniformly moves the cone entire surface. The positive dome is
only joined at its edge, causing it to be inactive beyond 16kHz for a flexible surface. The inverted dome directly radiates into the
air, with maximum efficiency, which is translated by an extremely precise soundstage. The dome’s response curve is clearly more
linear than that of any positive dome. It provides better space dispersion and very low directivity, contrary to ribbon tweeters.
The inverted dome tweeter offers unequalled dynamics, enabling sound engineers to very precisely control compression.

The
image precision (height, width and depth) is outstanding and makes the positioning of each element very easy, as well as allows
one to exactly assess the reverb tails.

Beryllium

Due to its incredible rigidity, Beryllium represents the ultimate material for a tweeter dome.

Focal, after two years of research and development, produced a world first: a pure Beryllium
inverted dome, able to cover more than five octaves (1000Hz – 40kHz). You may ask yourself why do we strive for an extended response at 40kHz, if the human ear can
only hear up to 20kHz? If you can extend frequency response, you will improve the perception
of transients and other micro details.
As well, the linearity of the speaker’s response curve is mainly a function of three opposite
parameters: lightness, rigidity and damping.

To this day, only one material permits a joining of
these parameters: Beryllium. For domes with identical masses, Beryllium is seven times more
rigid than Titanium or Aluminum, the latter two well known for their rigidity. This results in a
sound wave propagation three times faster than Titanium and two and a half times faster than
Aluminum. In the end, the linearity of the frequency response curve, the acoustic transparency
and the impulse response of the Beryllium tweeter are maximized and offer near-perfect
sound

“W” composite sandwich cone

The “W” composite sandwich cone permits total optimization of the frequency response curve, thanks to the
total control of three key parameters: lightness, rigidity and damping. At Focal, the letter “W” means Glass/
Glass, as it usually has two sheets of woven glass tissue that are “sandwiched” onto the structural foam
core. The glass tissue benefits from the incredibly fine weaving of very long fibres. This choice offers a mass
and a size clearly inferior to those in Aramid fibers or other Kevlar® fabrics, which generate coloration in
the midrange. It’s also important to note that the molecular bond between the resin and the glass is greater
than that obtained with Aramid fibres. The cone structure is more homogeneous and its behavior in flex is
much more superior.

These unique characteristics of lightness and rigidity provide control of the signal transmission speed inside the material. Adjusting the thickness of
the structural foam allows a very precise control of the “W” cone’s damping. The variation of the number of glass fibre sheets and the thickness
of the central foam can easily optimize the cone’s behaviour according to the desired frequency range.When listening, the sound of the “W” cone is entirely transparent, has an excellent phase response and has a very low disortion rate (rigidity 20
times higher than Kevlar® or Aramid fibre).

Inverted dome tweeter

Magnesium possesses great damping qualities, Aluminum great rigidity and the two in alloy can greatly reduce distortion. This
unique marriage of metals offers several advantages. The impulse response is incredibly rapid yet benefits from a very short
settlement time and excellent damping. This enables the tweeter to extend its frequency response beyond 28kHz (-3dB)…

This
configuration produces a precise, analytical sound and an extremely deep soundstage. The frequency response curve linearity
is also remarkable in that it ensures perfect neutrality. When listening, the treble frequencies are dynamic and detailed. The
Aluminum/Magnesium inverted dome tweeter then combines perfectly with the Polyglass woofer in a perfect tone synergy.

Polyglass cone

Polyglass technology, exclusive to Focal, consists in applying
molten glass microballs on a cellulose pulp cone. This
process combines an excellent paper damping with glass
rigidity. The rigidity index exceeds even that of a single skin
Kevlar® and is almost ten times superior to one of polypropylene.

The mass/rigidity/damping ratio adjustment results
in outstanding linearity of the frequency response curve, all
from the inherent design of the cone. This innovation also
greatly increases definition in the midrange.